【摘要】 以红松生殖枝和营养枝为研究对象,分析两种枝型当年生枝的性状特征与结实的相关性,为红松坚果林增产经营措施的制定提供理论依据。结果表明:生殖枝的枝长(29.4 cm)和枝基径(D)(16.73 mm)显著高于营养枝的枝长(23.2 cm)和枝基径(D)(9.48 mm)(P<0.001);当年生长性状特征变异较大,其中球果数的变异系数最大,枝基径的变异系数最小;通径分析显示,生殖枝的枝基径对球果产量影响最大,直接效应为0.707,回归分析显示,生殖枝的枝基径与球果数呈极显著的正相关关系(P<0.001),枝长与球果数呈不显著的负相关关系(P>0.05);枝基径16 mm≤D<19 mm的生殖枝占的比例最高(40.0%),球果数也最高(84个),营养枝的枝基径主要集中在7 mm≤D<10 mm,占所有枝的52.30%。更多还原

【Abstract】 With reproductive branch and vegetative branch of Pinus koraiensis, we studied the relationships between cones bearing and traits of current-year branch of the two branches for formulating management measures in increasing yield of P. koraiensis nut forest. The branch length(29.4 cm) and branch base diameter(D)(16.73 mm) of reproductive branch were significantly higher than the branch length(23.2 cm) and branch base diameter(D)(9.48 mm) of vegetative branch(P<0.001), respectively. The current-year growth traits had great variation, and the variation coefficient of cone number was the largest, and the variation coefficient of branch base diameter was the smallest. By path analysis, the basal diameter of reproductive branch had the greatest influence on cone yield with the direct effect of 0.707. By regression analysis, the branch base diameter of reproductive branch was positively correlated with cone number(P<0.001), and the branch length was negatively correlated with cone number, but not significant difference(P>0.05). The proportion of reproductive branch with branch base diameter in the range of 16 mm≤D<19 mm was the highest(40.0%), and the cone number was also the highest(84 cones). The basal diameter of vegetative branches was mainly concentrated on 7 mm≤D<10 mm, accounting for 52.3% of all branches.更多还原